First, the murder trial of an accountant charged with shooting his boss who allegedly caught him embezzling money. The jury will be back behind closed doors this morning. An important piece of evidence is released. The dramatic 911 call. Reporter: The morning, a Michigan jury deliberates for a third day the fate of Andy brown, the seemingly timid accountant accused of killing his 70-year-old boss. A key part of the case, this 911 call. What's going on? My boss is shot in the head. Is he breathing at all. No. He's beyond help? Reporter: The traumatized secretary on the line who also testified in court find the body of David Locey on the morning he was shot to death last year. I just got here. Oh, my gosh. Is he breathing. I need you to check and see if he's breathing, okay? Yes. I know it's hard. But you can do it. Reporter: Before police arrive, tammy rules out sd and names a suspect. You have an idea who did it? We think so, yes. There was an argument here yesterday. And -- Okay. Oh, my god. Who was he in the argument with yesterday? Andy brown. Andy brown? Reporter: Prosecutors say his boss found him stealing money. He lost his license once before after being convicted in 2005 of embezzlement. If his life was about to fall apart, he was going the take Mr. Locey with him, the man who gave him a second chance. Reporter: Investigators found gunshot residue on brown's clothes. He's pleaded not guilty. No gun was ever found. And, there's the mystery of a suspicious footprint at the scene. There's a print, a shoe print from the killer's shoe that doesn't match Andy brown's shoe. Reporter: For "Good morning America," bazi kanani, ABC news, Washington. We're going to bring in Dan a Abrams to weight in. What do you thing is going on? I think there's a divide on the jury. They had a question. The judge wouldn't say what the question was. He read back the jury instruction. He asked the jury to quote reset. There may have been a division. They may have suggested to the judge they're having issues. As a result, the judge says to reset. What could be dividing the Ju jury? This is not an easy case. There's a lot of evidence that makes it look like he could have done it. The motive, the gunshot residue. Cell phone records in this case. But there is no DNA. No blood. There is this mysterious footprint out there. And so I think it's possible that you have some jurors focusing on that legal standard of beyond a reasonable doubt and saying, wait a second, even if we think he did it, maybe that's not enough to get proof beyond a reasonable doubt. That could be the divide. That could be. We'll find out soon enough. Thank you, Dan.

This transcript has been automatically generated and may not be 100% accurate.

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